Ethiopian Opal Ring Sizes 5 through 10Sterling Silver ring with Ethiopian Opal The stone in this ring measures 8mm X 6mm This ring is size is available from size 5 through size 10. This piece has a thin band as shown and is also a good candidate for stacking with other rings. Please be aware that opal may change color slightly or become cloudy with heat and under water. You will receive a similar ring to the one pictured. There will be very little difference in appearance.